Question

1515,

Which of the following gives the lateral surface area of a cube of edge 18 cm?

(1 Point)

. 6 × 18*2

. 6 × 18b

Answer 1

Given :-

Edge of cube = 18 cm

To find :-

Lateral surface area of the cube.

Solution :-

Lateral surface area of cube = 4a²

LSA = 4 × (18)² cm

LSA = 4 × 324 cm

LSA = 1296 cm²

Procedure :-

→ This question of from the surface area of cubes and cuboids.

→ In this first we will do the square of 18 means we will multiply 18 by itself 2 times and then we will multiply it by 4.

→ The lateral surface area of cube means when we talk about the sides of a cube, we don't include top and bottom in that.

→ As we know that cube has 4 sides therefore we use 4a² formula. where a = length of sides which can be in cm/m.

Other formule :-

→ Total surface area of cube = 6a²

→ Total surface area of cuboid = 2(lb + bh + hl)

→ Curved surface area of cuboid = 2h(l + b)

$\sf{Where}$

l = Length

b = breadth

h = Height

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Answer 2

Answer:

Given :-

• The edge of cube is 18 cm.

To Find :-

• What is the lateral surface area of cube.

Formula Used :-

$\boxed{\bold{\large{Lateral\: surface\: area\: =\: 4a^{2}}}}$

Solution :-

The edge of cube is 18 cm.

According to the question by using the formula we get,

⇒ L.S.A = 4(18)²

⇒ L.S.A = 4 × 324

➠ L.S.A = 1296 cm²

$\therefore$ The lateral surface area of cube is 1296 cm² .

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